>> "bbc world news" is presented by kcet los angeles. funding for this presentation is made possible by... >> union bank has put its global expertise to work for a wide range of companies. what can we do for you? >> and now "bbc world news." >> in the past couple of decades, internet use has spread across the planet, invading every aspect of life. in countries like south korea, going online seems to have become a necessity. >> [speaking korean] >> usually, i go online as soon as i wake up. on average, i use the internet for about 6 hours a day. >> in a unique experiment, the bbc has removed internet access from 2 families for a week, in this the most wired nation on earth. >> in other parts of the world, the digital superhighway still hasn't reached its destination. how many people here actually know what the internet is? [indistinct chattering] >> internet? anybody? now, though, we're going to be providing internet access to this village in northern nigeria. so, what happens when we turn the internet on here? >> and off here? [indistinc